a(n) = numerator of b(n), where b(1) = 1, b(n+1) = Sum_{k=1..n} b(k)^((-1)^(n-k)).
A115600
a(n) = numerator of b(n), where b(1) = 1, b(n+1) = Sum_{k=1..n} b(k)^((-1)^(n-k)).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =4a(4) =13a(5) =43a(6) =905a(7) =15790a(8) =92494147a(9) =47283340087
External references
- oeis: A115600